Noun
(engineering, mining) The subfield of engineering concerned with designing and constructing tunnels, mines, and other human-designed geologic structures within and on earth.
The artificial manipulation of the environments of the Earth, especially as a means of counteracting global warming.
Source: en.wiktionary.orgHis paper, entitled “Evidence of Coal Fly Ash Toxic Chemical Geoengineering in the Troposphere: Consequences for Public Healthbring much-needed visibility and legitimacy to chemtrails, a subject that’s still unknown to mostcitizens. Source: Internet